9
SC-1
10. Squeeze the leaf clip, quickly slide the leaf inside, and allow it to close gently.
NOTE: It is critical to slip the leaf clip onto a leaf within 5 s of opening the clip or unacceptable errors may be
introduced into the conductance measurement.
The sensor head must remain still during measurement.
When measuring small needles or leaves, insert them into the sensor as shown in
Figure12. Multiple needles or small leaves (including blades of grass) may be needed to
adequately cover the sensor aperture for an accurate measurement. It may be necessary
to remove the leaves or needles from the plant to arrange them over the opening in the
diffusion path. Complete readings of removed leaves within 2 min of removal (prior to
stomatal closure) for an accurate measurement.
NOTE: The SC-1 may not be appropriate for all needle types. Highly sclerified, angular needles will prevent a
good seal over the diffusion path and the reading will be compromised.
Figure12 Measuring small leaves
The reading will begin once the leaf clip has been opened and closed. A progress bar
will indicate the reading is underway, and a countdown timer in the top right will appear
(Figure13).
Figure13 Measurement tab during reading
11. Once the measurement is complete, remove the leaf clip from the leaf and close it to
start equilibration for the next measurement.
12. Choose to save, annotate, or discard the data (Section2.3).